VIDEO: The Little River area of Miami is now free of active Zika transmission after no new cases were reported in the last 45 days, officials from the U.S. Centers for Disease Control and Prevention said today.

PHOTO: Students from Indian tribal school Kalinga Institute of Social Science (KISS) participate in forming a red ribbon, the symbol of HIV/AIDS, in an attempt to make a Guinness Book record in Bhubaneswar on Dec. 1, 2016.

PHOTO:Michael Worobey is a professor in the UA Department of Ecology and Evolutionary Biology. In previous research projects, he traced the origins of HIV in Africa and how the virus spread across the world.